Work is done on an object to increase its total energy. Which one of the following is true?
A) The total work done must be equal to the energy lost to heat and sound.
B) Both the kinetic energy and potential energy can be larger.
C) If the potential energy increases, then the kinetic energy must decrease.
D) The object must have a larger speed and smaller height above the ground.

Question

Quizplus · Accepted Answer

When work is done on an object to increase its total energy, both the kinetic energy and potential energy can increase. This is because work done on an object is equal to the change in its total energy, and this change can be distributed between kinetic and potential energy. Option A is incorrect because the total work done can be greater than the energy lost to heat and sound (if any). Option C is also incorrect because it is possible for both kinetic and potential energy to increase simultaneously. Option D is incorrect because it assumes a specific scenario where the object moves vertically (e.g. lifting an object), but the question does not provide enough information to determine the direction of the object's movement.

Work Is Done on an Object to Increase Its Total